Question: Solve the following inhomogeneous Euler equations using either variation of parameters or the change of variables method discussed in Exercise 7.4.13: (a) x2u + xu'

Solve the following inhomogeneous Euler equations using either variation of parameters or the change of variables method discussed in Exercise 7.4.13:
(a) x2u" + xu' - u = x
(b) x2u" - 2xu' + 2u = log x
(c) x2u" - 3xu' - 5u = 3x - 5

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